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\begin{document}

\section{Test mesh}

Test mesh comprises 7 triangles and 2 quadrilaterals. This mesh can be
created with \texttt{lf::mesh::test\_utils::GenerateHybrid2DTestMesh()}.

\includegraphics[width=\textwidth,clip]{multiref_L0}

\section{Regular refinement}

\begin{minipage}[c]{0.5\textwidth}
  \includegraphics[width=\textwidth]{fine_mesh}
 \end{minipage}%
\begin{minipage}[c]{0.5\textwidth}
  \includegraphics[width=\textwidth]{fine_mesh_pi}
\end{minipage}%

\section{Barycentric refinement}

\begin{minipage}[c]{0.5\textwidth}
  \includegraphics[width=\textwidth]{barycentric_ref}
 \end{minipage}%
\begin{minipage}[c]{0.5\textwidth}
  \includegraphics[width=\textwidth]{barycentric_ref_pi}
\end{minipage}%

\section{Global bisection refinement}

\begin{minipage}[c]{0.5\textwidth}
  \includegraphics[width=\textwidth]{allref}
 \end{minipage}%
\begin{minipage}[c]{0.5\textwidth}
  \includegraphics[width=\textwidth]{allref_pi}
\end{minipage}%
 
\end{document}

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